What is the pH scale? What is the pH range of an acid, base, and pure water?

A pH scale is a scale of measurement that describes the level of acidity or alkalinity of a solution.

The pH range of an acid is below 7.0; base is above 7.0, and pure water is 7.0

Explanation:

A pH scale is a scale of measurement that describes the level of acidity or alkalinity of a substance. It reads numerical values from 0 to 14.0 where values of 0 to 6.99 represent acid; 7 represent neutral; and values above 7.0 to 14.0 represent alkaline (base).